Finding the Fourth Proportional to 74,420.20, 111,630.30 and 66,125.80
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Solution
The fourth proportional to 74,420.20, 111,630.30 and 66,125.80 is: 99,188.70
Step by Step Solution
- Step 1: Write the proportion equation
74,420.20 : 111,630.30 = 66,125.80 : x - Step 2: Convert to fraction form
74,420.20/111,630.30 = 66,125.80/x - Step 3: Cross multiply
74,420.20x = 111,630.30 × 66,125.80 - Step 4: Simplify right side
74,420.20x = 7,381,642,891.74 - Step 5: Solve for x
x = 7,381,642,891.74/74,420.20 - Step 6: Final answer
x = 99,188.70
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.